本程序为常微分方程组的通用数值解法。定步长4阶龙格库塔法求解常微分方程组。-This program is universal numerical solution of ordinary differential equations. 4-order fixed step length Runge Kutta method of ordinary differential equations.

异步电机的启动仿真，用4阶龙格库塔法完成，matlab编程实现。-4 order Runnge_Kuttar

5个f语言有限差分正演程序，应用有限差分法在CPML边界条件下进行2D正演，前四个程序分别对应各向异性介质、各项同性2阶精度、各项同性4阶精度、双相介质4阶精度四种不同情况。最后一个是3D粘弹性介质的程序。-5 f language finite difference modeling, application of finite difference method under CPML boundary conditions 2D forward, the first four program